In pwm-backlight driver low threshold brightness support in DT is notpresent. Do you have any plans in such direction?

I am planning to add support for the same but want to avoid duplicationof work.

Below scenario describes need for it:On some boards panel backlight is OFF at low end of brightness scale.So with Low threshold brightness we can have linear scale in brightness(Though the actual brightness scale is changes to Low thresholdbrightness value instead of 0).